Mining-Induced Stress-Fissure Field Evolution and the Disaster-Causing Mechanism in the High Gas Working Face of the Deep Hard Strata

Table 3

Technical parameters of deep-hole blasting in long hanging roof.

Roadway	Number	Hole depth (m)	Dip angle (°)	Hole diameter (mm)	Charge length (m)	Blocking length (m)
Tail entry	1#	27	34	94	21	6
	2#	65	9	94	55	10
Head entry	3#	65	45	94	55	10
	4#	37	65	94	30	7
	5#	30	85	94	24	6